I was so fortunate to be in Arches after a rain storm. I was blessed with beautiful dramatic clouds the whole time! Shot in RAW and processed in Photoshop. This is not an HDR or composite. The sky is original to the shot. Shot right at sunset. f11, 1/20s ISO 100. Underexposed about 1.3 stops maybe a bit more allowing me to get all the detail in the sky. The 6D has great dynamic range into the shadows so I underexpose to get shots like this without an ND filter.